//  This file is part of YamlDotNet - A .NET library for YAML.
//  Copyright (c) Antoine Aubry and contributors

//  Permission is hereby granted, free of charge, to any person obtaining a copy of
//  this software and associated documentation files (the "Software"), to deal in
//  the Software without restriction, including without limitation the rights to
//  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
//  of the Software, and to permit persons to whom the Software is furnished to do
//  so, subject to the following conditions:

//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.

//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.

using System;

namespace YamlDotNet.Core
{
    [Serializable]
    internal sealed class SimpleKey
    {
        private readonly Cursor cursor;

        public bool IsPossible { get; private set; }

        public void MarkAsImpossible()
        {
            IsPossible = false;
        }

        public bool IsRequired { get; }
        public int TokenNumber { get; }
        public int Index => cursor.Index;
        public int Line => cursor.Line;
        public int LineOffset => cursor.LineOffset;

        public Mark Mark => cursor.Mark();

        public SimpleKey()
        {
            cursor = new Cursor();
        }

        public SimpleKey(bool isRequired, int tokenNumber, Cursor cursor)
        {
            IsPossible = true;
            IsRequired = isRequired;
            TokenNumber = tokenNumber;
            this.cursor = new Cursor(cursor);
        }
    }
}